That's a best case scenario. We can't guarantee there are actual eggs involved, but there are definitely machines involved. Photographic evidence is below.
This product isn't generally available stateside, since Western customers tend to dislike food served with unadulterated horror. It's our loss; just think about all those times you had a recipe that called for eight chicken's worth of boiled egg slices.
When a ton of fucking egg slices are called for, why not just invent a machine to take the shell off of eggs? That probably already exists. Then you could just go into business selling pre-shelled hard boiled eggs or something. Why's it gotta be a loaf, Japan? Tell us. TELL US DAMN YOU!!